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1 WE EED CON NTROL FIEF ELD TEST T DATA SDSU W.E.E.D. Project Weed Evaluation and Exten sion Demonstration Project dstate.edu/ps/extension/ /weed-mgmt South Dakotaa State University College of Agriculture & Biologicall Sciences Plant Science Department

2 SDSU W.E.E.D. Project Michael J. Moechnig Extension Weed Specialist Dave A. Vos Ag Research Specialist Darrell L. Deneke IPM Coordinator Jill K. Alms Senior Ag Technician ACKNOWLEDGEMENTS * Project Assistant: Cami Owens, Michael Vos * Experiment Farm Personnel at Brookings, Centerville, Highmore, Watertown, and Volga Herbicide Use information is available in the following fact sheets. These publications may be obtained at your regional extension center. Weed Control in Small Grain and Flax Weed Control in Soybeans Weed Control in Corn Weed Control in Sorghum Weed Control in Forage Legumes Noxious Weed Control Weed Control in Oilseeds Weed Control in Pulse Crops Weed Control in Grass Pasture & Range Chemical Weed Control in Trees Weed Control in CRP These fact sheets may also be found on the Internet at the following locations: (You will need to have Acrobat to read PDF files. It can be downloaded from that page.) NOTE: Data reported in this publication are results from field tests that include labeled product uses, experimental products or experimental rates, combinations or other unlabeled uses for herbicide products. Users are responsible for applying herbicides according to label directions. Refer to the appropriate weed control fact sheet, available from county extension offices, for herbicide recommendations. Issued in furtherance of SDSU Extension work, Acts of May 8 and June 30, 1914, in cooperation with the USDA. Dr. Barry Dunn, Dean and Director of SDSU Extension, South Dakota State University, Brookings. SDSU is an Affirmative Action/Equal Opportunity Employer (Male/Female) and offers all benefits, services, education and employment opportunities without regard for ancestry, age, race, citizenship, color, creed, religion, gender, disability, national origin, sexual preference, or Vietnam Era veteran status copies were printed at $1 each.

3 Table of Contents CORN Herbicide Demonstration: Corn Herbicide Demonstration, Northeast Research Farm... 1 Corn Herbicide Demonstration, Brookings Research Farm... 3 Corn Herbicide Demonstration, Southeast Research Farm... 5 New Products: Warrant Crop Response on Corn, Southeast Research Farm... 7 Anthem in Corn, Southeast Research Farm... 9 Weed Control with Realm Q, Northeast Research Farm Verdict & Sharpen in Corn, Brookings Research Farm Verdict in Corn, Southeast Research Farm ,4-D Formulation Study, Southeast Research Farm Herbicide Programs: One Pass Corn Programs, Brookings Research Farm One Pass Corn Programs, Southeast Research Farm Two Pass Corn Programs, Brookings Research Farm Two Pass Corn Programs, Southeast Research Farm Surestart Comparisons, Northeast Research Farm Fierce Early Preplant Burndown, Southeast Research Farm Pre Rimsulfuron & Mesotrione Mixes, Southeast Research Farm Impact Programs, Southeast Research Farm Dicamba Mixes with Glyphosate, Northeast Research Farm Adjuvants: Laudis + Oil Adjuvants, Southeast Research Farm Weed Competition & Cover Crops Corn Yield Loss with Volunteer Soybeans, Brookings Research Farm Volunteer Soybean Control in Corn, Brookings Research Farm White Clover Cover Crop in Corn, Southeast Research Farm SOYBEANS Herbicide Demonstration: Soybean Herbicide Demonstration, Northeast Research Farm Soybean Herbicide Demonstration, Brookings Research Farm Soybean Herbicide Demonstration, Southeast Research Farm New Products: Duration of Residual Activity in Soybeans, Southeast Research Farm Warrant in RR Soybeans, Southeast Research Farm Zidua Two-Pass Soybean Programs-Conventional Tillage, Southeast Research Farm Zidua Two-Pass Programs in No-Till Soybeans, Northeast Research Farm Warrant Crop Response on Soybean at Two Planting Times, Southeast Research Farm Anthem in Soybean, Southeast Research Farm Burndown with Sharpen, Optill, or Verdict in Soybeans, Southeast Research Farm Autumn Super & Tank Mixes, Southeast Research Farm... 54

4 SOYBEANS (continued ) Glyphosate Tank Mix Partners: Cadet in Soybean, Southeast Research Farm Roundup Weathermax+Clarity Efficacy on Broadleaf Weeds, Northeast Research Farm Glyphosate & Dicamba on Wild Buckwheat, Brookings Research Farm Clethodim Formulations with Glyphosate on Volunteer Corn, Volga Research Farm Herbicide Programs: Herbicides and Fungicides in Soybeans, Southeast Research Farm Ignite Weed Control Programs in Liberty Link Soybean, Southeast Research Farm Nozzles & Adjuvants: Drift Reduction Technology Nozzle Study, Volga Research Farm ,4-D Droplet Size Study, Southeast Research Farm Adjuvants with Sharpen Burndown, Southeast Research Farm Glyphosate+AMS Adjuvants in Soybeans, Volga Research Farm Difficult Weeds: Spring Dandelion Control, Southeast Research Farm Spring Dandelion Control, Northeast Research Farm Scouring Rush Control, Turner County Glyphosate Resistant Kochia Control Options, Northeast Research Farm Late Volunteer Canola Control, Brookings Research Farm Horseweed Late Applications in Soybeans, Southeast Research Farm Crop & Weed Tolerance: White Clover Cover Crop in Soybeans, Southeast Research Farm Grass Antagonism with Harmony in Soybeans, Brookings Research Farm Soybean Injury From 2,4-D and Dicamba Vapors, Brookings Research Farm Soybean Injury Due to Dicamba Vapors or Droplet Drift, Brookings Research Farm Soybean Tolerance to Glyphosate Exposure, Brookings Research Farm SMALL GRAIN Burndown Applications: Wheat Tolerance to Burndown Herbicides, Brookings Research Farm Valor and Fierce in Winter Wheat, Highmore Research Farm Spring Burndown-Downy Brome Control, Highmore Research Farm Broadleaf Weed Control: Prefer and Linkage Adjuvants in Spring Wheat, Brookings Research Farm Broadleaf Control with Weld in Spring Wheat, Brookings Research Farm Pyraflufen (ET and Pyresta) in Spring Wheat, Brookings Research Farm Starane Flex on Wild Mustard in Spring Wheat, Brookings Research Farm Starane Flex Efficacy in Spring Wheat, Brookings Research Farm Broadleaf Control with Supremacy in Spring Wheat, Brookings Research Farm Huskie in Spring Wheat, Brookings Research Farm Perennial Weeds (Canada Thistle and Quackgrass) in Spring Wheat, Northeast Research Farm... 91

5 SMALL GRAIN (continued ) Wild Oat Control: Adjuvants with Rimfire Max, Highmore Research Farm Grass Herbicide Mixes with Huskie in Spring Wheat, Brookings Research Farm ACCase Wild Oat Control in Spring Wheat, Brookings Research Farm Residual Activity of Olympus and Powerflex, Highmore Research Farm Everest 2.0 Plus Adjuvants, Highmore Research Farm Resistant Wild Oat Control with Goldsky in Spring Wheat, Brookings Research Farm Wild Oat Control with Goldsky in Spring Wheat, Brookings Research Farm Wild Oat Control with Zidua in Winter Wheat, Highmore Research Farm Green Foxtail Control: Foxtail Control in Barley, Brookings Research Farm Woolly Cupgrass Control: Axial Star in Spring Wheat, Northeast Research Farm Supremacy Tank Mixes in Spring Wheat, Northeast Research Farm Woolly Cupgrass Control in Spring Wheat, Northeast Research Farm Downy Brome (Cheatgrass) Control: Downy Brome Control with Pre-Pare, Highmore Research Farm Residual Control with Pre-Pare & Sierra in Spring Wheat, Highmore Research Farm Olympus Burndown for Downy Brome Control, Highmore Research Farm Olympus Flex Fall and Spring in Winter Wheat, Highmore Research Farm Downy Brome Control in Clearfield Winter Wheat, Stanley County Adjuvants with Beyond in Clearfield Wheat, Stanley County Spring Applications for Downy Brome Control in Winter Wheat, Highmore Research Farm Foxtail Barley Control: Foxtail Barley Control in Wheat, Codington County Barnyardgrass Control: Weld with Puma in Spring Wheat, Northeast Research Farm Cover Crops: Burndown Tank Mixes for Cover Crops, Brookings Research Farm SUNFLOWER Broadaxe in Sunflower, Northeast Research Farm ALFALFA Chateau & Fierce in Alfalfa, Highmore Research Farm MILLET Atrazine in Millet, Brookings Research Farm DRY BEAN Weed Control in Dry Bean, Brookings Research Farm

6 ACKNOWLEDGEMENT Extension educators identify needs, assist with tours, and utilize the data in education programs. The cooperation and assistance of station personnel is acknowledged. Southeast Experiment Station-Beresford Northeast Experiment Station-South Shore Agronomy Farm-Brookings Central South Dakota Research Station-Highmore Volga Experiment Station-Volga Program input and partial support for field programs is also acknowledged. South Dakota Soybean Research and Promotion Council South Dakota Wheat Commission Crop Protection Industries

7 ABBREVIATIONS Alfa ALFALFA Mael MARSHELDER Arko ALS RESISTANT KOCHIA Mata MARESTAIL Bare BAREGROUND Muth MUSK THISTLE Bdlf GENERAL BROADLEAF Perw PERENNIAL RAGWEED Bikw BIENNIAL KNAPWEED Pesw PENNSYLVANIA SMARTWEED Bisa BIENNIAL SAGE Prle PRICKLY LETTUCE Biww BIENNIAL WORMWOOD Prpw PROSTRATE PIGWEED Blmu BLUE MUSTARD Pumu PURPLE MUSTARD Blns BLACK NIGHTSHADE Qugr QUACKGRASS Blvv BLUE VERVAIN Recl RED CLOVER Brgr BROME GRASS Rrpw REDROOT PIGWEED Bygr BARNYARDGRASS Roft ROBUST FOXTAIL Cath CANADA THISTLE Ruth RUSSIAN THISTLE Cocb COMMON COCKLEBUR Shpu SHEPHERDSPURSE Colq COMMON LAMBSQUARTERS Stjw ST. JOHNSWORT Comu COMMON MULLEIN Tamu TANSY MUSTARD Comw COMMON MILKWEED Tawh TALL WATERHEMP Corw COMMON RAGWEED Tosp TOOTHED SPURGE Cosf COMMON SUNFLOWER VISUAL CROP RESPONSE RATING Cowh COMMON WATERHEMP Vele VELVETLEAF Crgr CRABGRASS Vema VENICE MALLOW Cudo CURLY DOCK Voal VOLUNTEER ALFALFA Dali DANDELION Voca VOLUNTEER CANOLA Dobr DOWNY BROME Voco VOLUNTEER CORN Fibw FIELD BINDWEED Vosg VOLUNTEER SPRING GRAIN Fipc FIELD PENNYCRESS Vosw VOLUNTEER SPRING WHEAT Fisb FIELD SANDBUR Voww VOLUNTEER WINTER WHEAT Ftba FOXTAIL BARLEY Wibw WILD BUCKWHEAT Fxtl GENERAL FOXTAIL Wimu WILD MUSTARD Grft GREEN FOXTAIL Wioa WILD OAT Guwe GUMWEED Wisf WILD SUNFLOWER Hocr HOARY CRESS Whcl WHITE CLOVER Jabr JAPANESE BROME Wocg WOOLLY CUPGRASS Kocz KOCHIA Wwsa WORMWOOD SAGE Lesp LEAFY SPURGE Yeft YELLOW FOXTAIL Llsa LANCELEAF SAGE Yetf YELLOW TOADFLAX SURFACTANTS COC CROP OIL CONCENTRATE 0.125% 1 PINT/100 GALLONS MSO METHYLATED SEED OIL 0.25% 1 QUART/100 GALLONS NIS NONIONIC SURFACTANT 0.5% 2 QUART/100 GALLONS 1% 1 GALLON/100 GALLONS AMS AMMONIUM SULFATE 2% 2 GALLON/100 GALLONS 4% 4 GALLON/100 GALLONS Crop response ratings () of 20% or less usually represents an acceptable level of stunting, discoloration or other effect. Ratings over 30% are considered excessive; 100% represents complete kill. Yields are harvested and reported for studies designed with replications. PLOT APPLICATIONS Herbicide treatments are applied with special plot sprayers. Unless otherwise noted, applications are made at 20 gpa and 35 psi using flat fan tips. Each treatment component is measured separately and mixed with water at application. Weed evaluations consist of visual ratings; averaged over replications or multiple ratings per plot. Ratings below 70-75% are considered less than commercially acceptable control; ratings greater than 90% represent a high level of effectiveness and generally reduce significant competition effects.

8 CORN HERBICIDE DEMONSTRATION Northeast Research Farm Wioa 6/30/11 Yeft 6/30/11 Check c 0 e 0 d 0 d 0 c 0 d 0 f 0 b 0 f 0 b 46 b Conventional Rrpw 6/30/11 Wibw 6/30/11 Yeft 9/13/11 Rrpw 9/13/11 Bygr 9/13/11 Corw 9/13/11 Wibw 9/13/11 Pesw 9/13/11 Yield bu/a 10/15/11 Pre & Post Verdict & Status+Option+MSO Corvus+Atrazine & Laudis+Atrazine+COC+AMS Harness Xtra 6L & Stout+Resolve+NIS+AMS 13 oz & 2.5 oz+ 1.5 oz+ 1.5 pt 3 oz + 1 pt & 3 oz + 1 pt + 1% lb 2 qt & 0.5 oz+ 0.5 oz % + 2 lb 89 ab 95 c 99 a 99 a 95 a 99 a 99 ab 99 a 96 ab 99 a 100 a 94 a 97 ab 99 a 99 a 99 a 99 a 99 a 99 a 99 a 99 a 117 a 95 a 98 a 99 a 99 a 97 a 98 a 98 abc 99 a 99 a 99 a 99 a 1 Epost Steadfast+Atrazine+COC+28% N 0.75 oz + 1 qt + 1% + 2 qt a 99 a 95 abc 99 a 99 a 99 a 118 a Capreno+Atrazine+COC 3 oz + 1 qt + 1% a 99 a 99 a 99 a 99 a 99 a 105 a Roundup Ready Pre & Post Harness Xtra 6L & Roundup Wmax+AMS Surestart & Durango+AMS Lumax & Touchdown Total+AMS Harness & Impact+Roundup Pmax+Atrazine+ Destiny HC+N Pak AMS 1.5 qt & 22 oz lb 1.75 pt & 24 oz lb 1.5 qt & 24 oz lb 1.75 pt & 0.5 oz + 22 oz + 1 pt % + 3 pt 91 ab 96 bc 99 a 99 a 98 a 98 a 99 a 99 a 99 a 99 a 107 a 87 ab 95 c 96 ab 92 b 97 a 99 a 98 abc 99 a 96 ab 99 a 97 a 92 ab 98 a 99 a 96 ab 99 a 99 a 99 a 99 a 99 a 99 a 108 a 87 ab 94 c 91 c 88 c 99 a 99 a 98 abc 99 a 99 a 99 a 113 a Epost Roundup Weathermax+AMS 22 oz lb b 88 c 85 e 99 a 86 e 99 a 99 a Halex GT+Atrazine+AMS 3.6 pt + 1 pt lb a 99 a 99 a 99 a 99 a 99 a 115 a Roundup Wmax+Atrazine+AMS 22 oz + 1 qt lb a 99 a 97 abc 99 a 99 a 99 a 111 a Surestart+Durango+AMS 1.75 pt + 24 oz lb a 99 a 96 abc 99 a 91 d 99 a 108 a

9 Wioa 6/30/11 Yeft 6/30/11 Rrpw 6/30/11 Wibw 6/30/11 Yeft 9/13/11 Rrpw 9/13/11 Bygr 9/13/11 Corw 9/13/11 Wibw 9/13/11 Pesw 9/13/11 Yield bu/a 10/15/11 Liberty Link Pre & Post Surestart & Ignite+AMS Balance Flexx+Atrazine & Ignite+AMS 2 pt & 22 oz lb 3 oz + 1 pt & 22 oz lb 87 ab 95 c 95 b 95 ab 90 a 99 a 93 c 99 a 92 cd 98 a 115 a 83 b 91 d 96 ab 85 c 91 a 98 a 94 bc 99 a 94 bc 99 a 93 a Epost Breakfree+Ignite+AMS 1.5 pt + 22 oz lb a 96 b 96 abc 99 a 98 a 99 a 106 a Ignite+Atrazine+AMS 22 oz + 1 pt lb a 98 a 88 d 99 a 96 ab 99 a 110 a Ignite+Capreno+Atrazine+AMS 22 oz +2 oz +1 pt +1.5 lb a 99 a 98 abc 99 a 98 a 99 a 117 a 2 RCB: 4 reps Variety: Pio 9494 RR/LL Pre: 1 st week 1.24 inches Planting Date: 5/17/11 2 nd week 2.46 inches Pre: 5/17/11 Epost: 1 st week 1.90 inches Epost: 6/16/11 Corn 1-2 collar, 3 in; Wioa 4-6 in; Yeft 1-3 in; Rrpw 1-2 in. 2 nd week 0.50 inches Wibw 2-3 in; Corw 1-2in; Bygr 1-3 in; Pesw 1-3 in. Post: 1 st week 1.50 inches Post: 6/30/11 Corn 3 collar, 5-7 in; Wioa 5-7 in; Yeft 3-4 in; Rrpw 2-4 in. 2 nd week 2.36 inches Wibw 3-5 in; Corw 1-4 in; Bygr 2-5 in; Pesw 2-4 in. Wioa=Wild oat Yeft=Yellow foxtail Soil: Clay Loam; 4.1% OM; 5.8 ph Rrpw=Redroot pigweed Wibw=Wild buckwheat Corw=Common ragweed Bygr=Barnyardgrass Pesw=Pennsylvania smartweed The objective of this study was to demonstrate some common Roundup Ready, Liberty Link, and conventional herbicide programs in corn. The same variety was planted in each treatment. Most of the PRE treatments resulted in very good weed control. Verdict (saflufenacil + dimethenamid) and Surestart (acetochlor + flumetsulam + clopyralid) do not contain atrazine, but provided moderate to good wild buckwheat control. Balance Flexx (isoxaflutole) resulted in slightly less grass control than the PRE treatments that contain acetochlor or metolachlor. Nearly all treatments resulted in nearly complete weed control after the POST treatments were applied. This demonstrated that Liberty Link and conventional programs could provide similar weed control as Roundup Ready programs. One application of Roundup resulted in some late season grass and wild buckwheat escapes. However, adding atrazine or other some other tank mix partners controlled these escapes. It was interesting that Surestart applied POST did not greatly improve wild buckwheat control even though it contains clopyralid. Ignite (glufosinate) + atrazine resulted in some barnyardgrass escapes, but other tank mixes resulted in nearly complete grass control. Corn yield was similar among all treatments.

10 CORN HERBICIDE DEMONSTRATION Brookings Research Farm Grft 6/15/11 Colq 6/15/11 Check b 0 b 0 b 0 e 0 b 0 c 0 c 0 b 0 d 0 e 79 b Rrpw 6/15/11 Wibw 6/15/11 Wimu 6/15/11 Colq 9/2/11 Corw 9/2/11 Rrpw 9/2/11 Grft 9/2/11 Wibw 9/2/11 Yield bu/a 10/14/11 3 Conventional Pre & Post Verdict & Status+Option+MSO Corvus+Atrazine & Laudis+Atrazine+COC+AMS Harness Xtra 6L & 13 oz & 2.5 oz+ 1.5 oz+ 1.5 pt 3 oz + 1 pt & 3 oz + 1 pt + 1% lb 2 qt & 0.5 oz+ 0.5 oz % + 2 lb 99 a 99 a 99 a 99 a 100 a 99 a 99 a 99 a 98 a 98 ab 198 a 99 a 99 a 99 a 92 ab 100 a 99 a 99 a 99 a 99 a 98 ab 213 a 99 a 99 a 99 a 98 a 100 a 99 a 99 a 99 a 99 a 97 ab 205 a Stout+Resolve+NIS+AMS Epost Steadfast+Atrazine+COC+28% N 0.75 oz + 1 qt + 1% + 2 qt a 98 b 99 a 89 b 99 a 203 a Capreno+Atrazine+COC 3 oz + 1 qt + 1% a 99 a 99 a 88 b 99 a 201 a Roundup Ready Pre & Post Harness Xtra 6L & Roundup Wmax+AMS Surestart & Durango+AMS Lumax & Touchdown Total+AMS Harness & Impact+Roundup Pmax+Atrazine+ Destiny HC+ N Pak AMS 1.5 qt & 22 oz lb 1.75 pt & 24 oz lb 1.5 qt & 24 oz lb 1.75 pt & 0.5 oz + 22 oz + 1 pt % + 3 pt 99 a 99 a 99 a 94 ab 100 a 99 a 99 a 99 a 99 a 98 ab 207 a 99 a 99 a 99 a 85 c 100 a 99 a 99 a 99 a 98 a 96 ab 202 a 99 a 99 a 99 a 92 ab 100 a 99 a 99 a 99 a 98 a 98 ab 202 a 99 a 99 a 99 a 63 d 100 a 99 a 99 a 99 a 99 a 96 ab 210 a Epost Roundup Weathermax+AMS 22 oz lb b 99 a 99 a 88 b 95 b 211 a Halex GT+Atrazine+AMS 3.6 pt + 1 pt lb a 99 a 99 a 98 a 99 a 206 a Roundup Wmax+Atrazine+AMS 22 oz + 1 qt lb a 99 a 99 a 96 a 98 ab 211 a Surestart+Durango+AMS 1.75 pt + 24 oz lb a 99 a 99 a 98 a 95 ab 202 a

11 Grft 6/15/11 Colq 6/15/11 Rrpw 6/15/11 Wibw 6/15/11 Wimu 6/15/11 Colq 9/2/11 Corw 9/2/11 Rrpw 9/2/11 Grft 9/2/11 Wibw 9/2/11 Yield bu/a 10/14/11 Liberty Link Pre & Post Surestart & Ignite+AMS Balance Flexx+Atrazine & Ignite+AMS 2 pt & 22 oz lb 3 oz + 1 pt & 22 oz lb 99 a 99 a 99 a 89 bc 100 a 99 a 99 a 99 a 99 a 90 c 205 a 99 a 99 a 99 a 86 c 100 a 99 a 99 a 99 a 97 a 86 d 211 a Epost Breakfree+Ignite+AMS 1.5 pt + 22 oz lb b 99 a 99 a 85 c 87 d 203 a Ignite+Atrazine+AMS 22 oz + 1 pt lb a 99 a 99 a 90 b 98 ab 206 a Ignite+Capreno+Atrazine+AMS 22 oz + 2 oz + 1 pt lb a 99 a 99 a 96 a 99 a 207 a 4 RCB: 4 reps Variety: Pio 9494 RR/LL Pre: 1 st week 0.53 inches Planting Date: 5/6/11 2 nd week 1.06 inches Pre: 5/6/11 Epost: 1 st week 0.65 inches Epost: 6/8/11 Corn 5-7 in, V3; Grft 3-5 in; Colq 1-2in; Wibw 2-4 in. 2 nd week 2.45 inches Rrpw 2-3 in; Wimu 2-5 in; Corw 2-4 in. Post: 1 st week 2.45 inches Post: 6/15/11 Corn 8-10 in, V4; Grft 1-3 in; Colq 1-3 in; Wibw 1-3 in. 2 nd week 0.24 inches Rrpw 1-3 in; Wimu 2-4 in; Corw 1-4 in. Soil: Clay Loam; 3.0% OM; 6.3 ph Grft=Green foxtail Colq=Common lambsquarters Rrpw=Redroot pigweed Wibw=Wild buckwheat Wimu=Wild mustard Corw=Common ragweed The objective of this study was to evaluate Roundup Ready, Liberty Link, and conventional herbicide programs in corn. The same variety was planted in each treatment. Several of the PRE treatments resulted in very good weed control, but there were some wild buckwheat escapes in the Surestart (acetochlor + flumetsulam + clopyralid) and Harness (acetochlor) treatments. Nearly all treatments resulted in good weed control after the POST treatments were applied. In the conventional programs, the PRE followed by POST treatments resulted in the most consistent weed control. In the Roundup Ready programs, Roundup alone resulted in some weed escapes but PRE s or tank mix partners resulted in nearly complete weed control. In the Liberty Link programs, Surestart followed by Ignite or Ignite + Capreno (thiencarbazone + tembotrione) resulted in the greatest weed control. Corn yield was similar among all treatments which indicated the weed escapes were not large enough to cause yield loss.

12 CORN HERBICIDE DEMONSTRATION Southeast Research Farm Fota 6/27/11 Cowh 6/27/11 Cowh 8/9/11 Bygr 8/9/11 Cowh 9/21/11 Bygr 9/21/11 Yield bu/a 10/18/11 Check b 0 b 0 c 0 e 0 d 0 d 137 b Conventional Pre & Post Verdict & Status+Option+MSO Corvus+Atrazine & Laudis+Atrazine+ COC+AMS Harness Xtra 6L & Stout+Resolve+ NIS+AMS 13 oz & 2.5 oz+ 1.5 oz+ 1.5 pt 3 oz + 1 pt & 3 oz + 1 pt + 1% lb 2 qt & 0.5 oz+ 0.5 oz % + 2 lb 99 a 99 a 98 a 98 a 98 a 98 a 168 a 99 a 99 a 99 a 99 a 99 a 99 a 175 a 99 a 99 a 99 a 98 a 99 a 99 a 176 a Post Steadfast+Atrazine oz + 1 qt b 89 d 80 c 79 c 169 a COC+28% N 1% + 2 qt Capreno+Atrazine+COC 3 oz + 1 qt + 1% a 91 cd 97 a 88 b 165 a Roundup Ready Pre & Post Harness Xtra 6L & Roundup Wmax+AMS Surestart & Durango+AMS Lumax & Touchdown Total+AMS Harness & Impact+Roundup Pmax+ Atrazine+Destiny HC+ N Pak AMS 1.5 qt & 22 oz lb 1.75 pt & 24 oz lb 1.5 qt & 24 oz lb 1.75 pt & 0.5 oz +22 oz + 1 pt % + 3 pt 99 a 99 a 99 a 99 a 98 a 99 a 178 a 99 a 99 a 99 a 99 a 98 a 99 a 183 a 99 a 99 a 99 a 99 a 99 a 99 a 173 a 99 a 99 a 99 a 99 a 99 a 99 a 172 a Post Roundup Wmax+AMS 22 oz lb a 99 a 98 a 99 a 174 a Halex GT+Atrazine+ 3.6 pt + 1 pt a 98 a 99 a 98 a 171 a AMS 2.5 lb Roundup Wmax+Atrazine+ 22 oz + 1 qt a 99 a 98 a 99 a 175 a AMS 2.5 lb Surestart+Durango+AMS 1.75 pt + 24 oz lb a 99 a 98 a 98 a 166 a Liberty Link Pre & Post Surestart & Ignite+AMS Balance Flexx+Atrazine & Ignite+AMS 2 pt & 22 oz lb 3 oz + 1 pt & 22 oz lb 99 a 99 a 99 a 99 a 99 a 99 a 172 a 99 a 99 a 99 a 98 a 98 a 98 a 175 a Post Breakfree+Ignite+AMS 1.5 pt +22 oz +2.5 lb a 95 ab 92 b 89 b 172 a Ignite+Atrazine+AMS 22 oz + 1 pt lb a 92 bc 92 b 93 ab 169 a Ignite+Capreno+Atrazine+ AMS 22 oz +2 oz +1 pt lb a 94 ab 98 a 92 ab 156 a 5

13 CORN HERBICIDE DEMONSTRATION Southeast Research Farm RCB: 4 reps Variety: Pio 9494 RR/LL Pre: 1 st week 1.02 inches Planting Date: 5/10/11 2 nd week 2.10 inches Pre: 5/10/11 Post: 1 st week 0.36 inches Post: 6/24/11 Corn V5 12 in. 2 nd week 0.00 inches Fota 3-5 in; Cowh 2-6 in. Bygr 3-6 in. Soil: Silty Clay Loam; 3.0% OM; 6.8 ph Fota=Foxtail Cowh=Common waterhemp Bygr=Barnyardgrass The objective of this study was to compare common weed control programs in Roundup Ready, Liberty Link, and conventional corn. The same corn variety was planted in each treatment. All PRE followed by POST treatments resulted in nearly complete weed contol. The one pass Roundup programs also resulted in nearly complete weed control whereas some of the one pass conventional or Liberty Link programs were less consistent. Adding Capreno (thiencarbazone + tembotrione) improved waterhemp control in the conventional and Liberty Link treatments. Corn yield was similar among all treatments which indicates that the weed escapes were not large enough to affect corn yield. 6

14 WARRANT CROP RESPONSE on CORN Southeast Research Farm 6/22/11 6/28/11 7/7/11 8/1/11 Yield bu/a 10/18/11 V2 Roundup Wmax+ Warrant+Class Act NG Roundup Wmax+ Warrant+Class Act NG Roundup Wmax+ Warrant Roundup Wmax oz qt + 2% 22 oz + 3 qt + 2% 22 oz qt + 60 qt 22 oz + 60 qt 0a 0a 0 a 0 a 151a 0a 0a 0 a 0 a 157a 0a 0a 0 a 0 a 159a 0a 0a 0 a 0 a 159a V5-V6 Roundup Wmax+ 22 oz + 0a 0a 0 a 0 a 150a Warrant+Class Act NG 1.5 qt + 2% Roundup Wmax+ 22 oz + 0a 0a 0 a 0 a 155a Warrant+Class Act NG 3 qt + 2% Halex GT+Class Act NG 2 qt + 2% 0 a 0 a 0 a 0 a 152 a Roundup Wmax+Warrant+ 22 oz qt + 0a 0a 0 a 0 a 149a Callisto+Class Act NG 3 oz + 2% Roundup Wmax+Warrant+ 22 oz qt + 0a 0a 0 a 0 a 148a Impact+Class Act NG+MSO 0.73 oz + 2% + 0.5% Roundup Wmax+Warrant+ 22 oz qt + 0a 0a 0 a 0 a 152a Laudis+Class Act NG+MSO 3 oz + 2% + 0.5% Roundup Wmax+Warrant+ 22 oz qt + 0a 0a 0 a 0 a 150a Status+Class Act NG Roundup Wmax+Warrant+ Callisto+Resolve+Class Act NG 3.93 oz + 2% 22 oz qt + 3 oz oz + 2% 0a 0a 0 a 0 a 151a Roundup Wmax+ Warrant+Class Act NG Roundup Wmax+ Warrant+Class Act NG 22 oz qt + 2% 22 oz + 3 qt + 2% 0a 0a 0 a 0 a 146a 0a 0a 0 a 0 a 148a Check a 0 a 0 a 0 a 105 b RCB: 4 reps Variety: DKC 5259 VT3 V2: 1 st week 1.35 inches Planting Date: 5/10/11 2 nd week 2.09 inches V2: 6/7/11 V5-V6: 1 st week 0.36 inches V5-V6: 6/24/11 2 nd week 0.00 inches : 7/12/ : 1 st week 0.85 inches Soil: Silty Clay Loam; 3.0% OM; 6.8 ph 2 nd week 0.00 inches =Visual Crop Response Rating (0=no injury; 100=complete kill) 7

15 WARRANT CROP RESPONSE on CORN Southeast Research Farm The objective of this study was to evaluate corn tolerance to Warrant (acetochlor) applied POST at different times. Warrant is an encapsulated formulation of acetochlor (e.g. Harness) that can be applied in soybeans early POST. Corn injury was not observed and yield was similar among all treatments. Therefore, results from this study inidicated that Warrant may be applied in corn POST without causing injury. These results may be used to expand current labeled uses of Warrant. 8

16 ANTHEM in CORN Southeast Research Farm Cowh 6/27/11 Pesw 6/27/11 Vele 6/27/11 6/27/11 Vele 7/7/11 Cowh 7/7/11 Pesw 7/7/11 Yield bu/a 10/17/11 Pre & Epost Anthem & GlyStar+AMS Anthem & GlyStar+AMS Anthem+Atrazine & GlyStar+AMS Anthem+Atrazine & GlyStar+AMS Verdict & GlyStar+AMS Harness & GlyStar+AMS Harness Xtra 6L & GlyStar+AMS Balance Flexx & GlyStar+AMS 8 oz & 32 oz lb 10 oz & 32 oz lb 8 oz + 1 qt & 32 oz lb 8 oz qt & 32 oz lb 13 oz & 32 oz lb 2 pt & 32 oz lb 2 qt & 32 oz lb 3 oz & 32 oz lb 99 a 95 a 99 a 0 a 98 ab 99 a 98 ab 114 a 99 a 96 a 99 a 0 a 98 ab 99 a 98 ab 114 a 99 a 99 a 99 a 0 a 98 ab 99 a 99 a 115 a 99 a 99 a 98 ab 0 a 98 ab 99 a 99 a 116 a 99 a 99 a 99 a 0 a 99 a 99 a 99 a 116 a 99 a 96 a 97 ab 0 a 98 ab 99 a 99 a 113 a 99 a 99 a 95 b 0 a 99 a 99 a 99 a 122 a 99 a 97 a 99 a 0 a 99 a 98 a 99 a 125 a Epost Weed desiccation Anthem+GlyStar+ 7 oz + 32 oz + 88 b 0 a 98 ab 99 a 97 bc 122 a NIS+AMS 0.25% lb Anthem+GlyStar+ 9 oz + 32 oz + 95 a 0 a 98 ab 99 a 99 a 114 a NIS+AMS 0.25% lb Anthem+GlyStar+ 7 oz + 32 oz + 87 b 0 a 98 ab 99 a 97 c 117 a Atrazine+AMS 1.75 pt lb Halex GT+AMS 3.6 pt lb 28 c 0 a 99 a 99 a 98 ab 119 a GlyStar+AMS 32 oz lb 15 d 0 a 96 b 98 a 94 d 114 a Check b 0 e 0 c 0 a 0 c 0 b 0 e 68 b RCB: 4 reps Variety: DKC 5259 VT3 Pre: 1 st week 2.10 inches Planting Date: 5/18/11 2 nd week 1.47 inches Pre: 5/18/11 Epost: 1 st week 0.36 inches Epost: 6/24/11 Corn 5-6 lf, in. 2 nd week 0.00 inches Cowh 3-6 in; Pesw 5-8 in; Vele 3-6 in. Soil: Clay; 3.1% OM; 7.1 ph =Visual Crop Response Rating (0=no injury; 100=complete kill) Cowh=Common waterhemp Pesw=Pennsylvania smartweed Vele=Velvetleaf 9

17 ANTHEM in CORN Southeast Research Farm The objective of this study was to evaluate weed control from Anthem (fluthiacet + pyroxasulfone) in corn. Pyroxasulfone is a similar chemistry as metolachlor (Dual) or acetochlor (Harness). Fluthiacet is currently sold as Cadet. When applied PRE or POST with glyphosate, Anthem resulted in nearly complete control of velvetleaf, waterhemp, and smartweed. General weed desiccation was recorded shortly after the EPOST application to demonstrate differences in weed response time to the different herbicides. Adding Anthem with glyphosate greatly increased the response time relative to glyphosate alone. Therefore, results from this study demonstrated that Anthem may be an effective herbicide for added foliar and residual weed control in corn. 10

18 WEED CONTROL with REALM Q Northeast Research Farm Grass 7/14/11 Corw 7/14/11 Rrpw 7/14/11 Kocz 7/14/11 Colq 7/14/11 Yeft 9/13/11 Kocz 9/13/11 Rrpw 9/13/11 Corw 9/13/11 Colq 9/13/11 Wibw 9/13/11 Pesw 9/13/11 Yield bu/a 10/15/11 Pre & Post Breakfree & Realm Q+Abundit+ AMS Breakfree & Abundit+AMS 1 pt & 4 oz + 32 oz lb 1 pt & 32 oz lb 100 a 100 a 100 a 100 ab 100 a 99 a 98 a 99 a 98 a 99 a 99 a 99 a 100 ab 100 a 100 a 100 a 100 ab 100 a 99 a 99 a 98 a 99 a 99 a 98 b 99 a 104 ab 11 Epost & Post Realm Q+COC+AMS & Abundit+AMS 4 oz +1% +3.4 lb & 32 oz lb 100 a 100 a 100 a 100 a 100 a 98 a 99 a 99 a 99 a 99 a 98 ab 99 a 115 a Post Realm Q+Abundit+AMS 4 oz +32 oz +3.4 lb 99 a 99 a 99 a 99 ab 94 b 99 a 96 a 98 a 99 a 99 a 99 a 99 a 91 ab Realm Q+Ignite+AMS 4 oz +22 oz +3.4 lb 97 b 99 a 97 b 98 b 99 a 83 b 93 a 99 a 95 a 99 a 98 b 94 a 86 b Breakfree+Realm Q+ 1 pt + 4 oz + 99 a 97 a 99 a 99 ab 99 a 99 a 98 a 99 a 99 a 99 a 99 a 99 a 92 ab Abundit+AMS 32 oz lb Realm Q+Abundit+ 4 oz + 32 oz + 99 a 99 a 99 a 99 ab 99 a 99 a 97 a 98 a 99 a 99 a 99 a 99 a 96 ab Atrazine 90DF+AMS Halex GT+Atrazine+ AMS+NIS 0.5 lb lb 3.6 pt + 1 pt lb % 99 a 99 a 99 a 99 ab 99 a 99 a 99 a 98 a 99 a 99 a 99 a 99 a 100 ab Check c 0 b 0 c 0 c 0 c 0 c 0 b 0 b 0 b 0 b 0 c 0 b 49 c

19 WEED CONTROL with REALM Q Northeast Research Farm 12 RCB: 4 reps Variety: Pio 9494 RR/LL Pre: 1 st week 1.24 inches Planting Date: 5/17/11 2 nd week 2.46 inches Pre: 5/17/11 Epost: 1 st week 1.90 inches Epost: 6/16/11 Corn 1-2 collar, 3 in; Rrpw 1-2 in; Colq 1-2 in; Yeft 1-3 in; 2 nd week 0.50 inches Wioa 4-6 in; Corw 1-2 in; Kocz 1-3 in; Wibw 2-3 in; Pesw 1-3 in. Post: 1 st week 1.50 inches Post: 6/30/11 Corn 3 collar, 5-7 in; Rrpw 2-4 in; Colq 2-4 in; Yeft 3-4 in; 2 nd week 2.36 inches Wioa 5-7 in; Corw 1-4 in; Kocz 2-4 in; WIbw 3-5 in; Pesw 2-4 in. Soil: Clay Loam; 4.1% OM; 5.8 ph Grass=Yellow foxtail & Wild oat Corw=Common ragweed Rrpw=Redroot pigweed Kocz=Kochia Colq=Common lambsquarters Yeft=Yellow foxtail Wibw=Wild buckwheat Pesw=Pennsylvania smartweed The objective of this study was to evaluate Realm (rimsulfuron + mesotrione) for weed control in corn. Realm is a new herbicide from DuPont. Abundit is glyphosate. Nearly all treatments resulted in complete weed control except Realm + Ignite resulted in several yellow foxtail escapes. This likely contributed to the corn yield loss that was observed from this treatment. Therefore, results from this study demonstrated that Realm may be effective in Roundup Ready corn but additional tank mixes may be needed in Liberty Link programs.

20 VERDICT & SHARPEN IN CORN Brookings Research Farm Cocb 6/25/11 Corw 6/25/11 Pesw 6/25/11 Bygr 7/29/11 Cocb 7/29/11 Corw 7/29/11 Pesw 7/29/11 Bygr 9/12/11 Cocb 9/12/11 Yield bu/a 10/14/11 Check d 0 c 0 b 0 c 0 b 0 b 0 c 0 c 0 b 44 c Pre & Midpost Verdict & RU Pmax+NIS+ AMS Lumax & RU Pmax+NIS+ AMS Corvus+Atrazine & RU Pmax+NIS+ AMS Harness Xtra 6L & RU Pmax+NIS+ AMS Sharpen+G-Max Lite & RU Pmax+NIS+ AMS Surestart & RU Pmax+NIS+ AMS Verdict & Status+RU Pmax+ NIS+AMS Atrazine & RU Pmax+NIS+ AMS Midpost RU Pmax+NIS+ AMS 15 oz & 22 oz % lb 2 qt & 22 oz % lb 3.33 oz + 1 qt & 22 oz % lb 1 qt & 22 oz % lb 2.5 oz pt & 22 oz % lb 1.75 pt & 22 oz % lb 13 oz & 2.5 oz + 22 oz % lb 1 qt & 22 oz % lb 22 oz % lb 98 a 99 a 99 a 99 a 98 a 99 a 99 a 98 a 97 a 143 a 97 a 99 a 99 a 99 a 96 a 99 a 99 a 99 a 95 a 149 a 92 ab 99 a 99 a 99 a 99 a 99 a 99 a 99 a 98 a 139 a 83 c 96 a 99 a 99 a 99 a 99 a 99 a 99 a 98 a 165 a 93 ab 99 a 99 a 99 a 97 a 99 a 99 a 98 a 94 a 154 a 83 c 99 a 99 a 99 a 94 a 99 a 99 a 99 a 93 a 153 a 93 ab 98 a 99 a 99 a 96 a 99 a 99 a 99 a 95 a 156 a 87 bc 90 b 99 a 98 a 98 a 99 a 99 a 98 a 98 a 135 a b 99 a 99 a 94 b 91 b 97 a 83 b RCB: 4 reps Variety: Pio 9494 RR/LL Pre: 1 st week 0.53 inches Planting Date: 5/6/11 2 nd week 1.06 inches Pre: 5/6/11 Midpost: 1 st week 0.94 inches Midpost: 6/25/11 Corn V4-5; Cocb 4-8 in; 2 nd week 0.15 inches Corw 1-2 in; Pesw 2-5 in; Bygr 2-4 in. Soil: Clay Loam; 3.2% OM; 6.2 ph Cocb=Common cocklebur Corw=Common ragweed Pesw=Pennsylvania smartweed Bygr=Barnyardgrass 13

21 VERDICT & SHARPEN IN CORN Brookings Research Farm The objective of this study was to evaluate Sharpen (saflufenacil) and Verdict (saflufenacil + dimethenamid) in Roundup Ready corn. Harness Xtra (acetochlor + atrazine), Surestart (acetochlor + flumetsulam + clopyralid), and Atrazine 4L (1 qt) resulted in incomplete cocklebur control whereas the other PRE treatments resulted in good control. Nevertheless, the POST treatments controlled all the weed escapes and corn yield was not affected. It was interesting to note that the single glyphosate application resulted in incomplete weed control which reduced corn yield. Therefore, results from this study demonstrated that Verdict may be equally or more effective for weed control relative to other herbicides available. 14

22 VERDICT in CORN Southeast Research Farm 6/22/11 Vele 6/24/11 Cowh 6/24/11 Vele 8/9/11 Cowh 8/9/11 Grft 8/9/11 Gray Leaf Spot 8/29/11 Yield bu/a 10/18/11 Post RU Wmax+NIS+AMS 22 oz % lb 0 a b 98 b 99 a 16 a 159 a Pre & Post G-Max Lite & RU Wmax+NIS+AMS Verdict & RU Wmax+NIS+AMS Verdict & RU Wmax+Headline+ NIS+AMS Pre & Post & Tassel Verdict & RU Wmax+NIS+AMS & Headline AMP+NIS Verdict & RU Wmax+Headline+ NIS+AMS & Headline AMP+NIS 32 oz & 22 oz % lb 15 oz & 22 oz % lb 15 oz & 22 oz + 6 oz % +3.4 lb 15 oz & 22 oz % lb & 10 oz % 15 oz & 22 oz + 6 oz % +3.4 lb & 10 oz % 0a 98a 99a 99a 99 a 99 a 17a 158a 0a 99a 99a 99a 99 a 99 a 16a 161a 0a 99a 99a 99a 99 a 99 a 11b 161a 0 a 99 a 99 a 99 a 99 a 99 a 6 c 168 a 0 a 99 a 99 a 99 a 99 a 99 a 4 c 161 a Check a 0 b 0 b 0 c 0 c 0 b 13 ab 119 b RCB: 6 reps Variety: DKC 5259 VT3 Pre: 1 st week 1.02 inches Planting Date: 5/10/11 2 nd week 2.10 inches Pre: 5/10/11 Post: 1 st week 0.36 inches Post: 6/24/11 Corn V5 12 in; Vele 4-6 in. 2 nd week 0.00 inches Cowh 2-6 in; Grft 3-4 lf, 3-5 in. Tassel: 1 st week 0.00 inches Tassel: 7/28/11 2 nd week 0.11 inches Soil: Silty Clay Loam; 3.0% OM; 6.8 ph =Visual Crop Response Rating (0=no injury; 100=complete kill) Vele=Velvetleaf Cowh=Common waterhemp Grft=Green foxtail The objective of this study was to evaluate pest management programs that use Verdict (saflufenacil + dimethenamid) in corn. All herbicide treatments resulted in nearly complete weed control. Some corn leaf disease, which may have been gray leaf spot, was noticed late in the season. The treatments that included Headline, a fungicide, seemed to reduce the visible disease appearance, particularly if applied at tassel, but it did not significantly increase corn yield. 15

23 2,4-D FORMULATION STUDY Southeast Research Farm Pesw 7/7/11 Pesw 8/1/11 E pt 72 ab 70 a 2,4-D Ester LV pt 63 b 43 b 2,4-D Amine 4 1 pt 67 ab 67 a Check c 0 c RCB: 3 reps Post: 6/28/11 Pesw in. Burndown: 1 st week 0.00 inches Soil: Loam; 2.9% OM; 6.8 ph 2 nd week 0.00 inches Pesw=Pennsylvania smartweed The objective of this study was to evaluate 2,4-D formulations for weed control in corn. Several other experimental 2,4-D formulations were also included in this study, but those results were not published. Results indicated that E-99, a 2,4-D ester from Winfield Solutions, was more effective than the LV 6 ester formulation but was equally effective as the amine formulation. These results were somewhat unexpected as it is typically believed that ester formulations are generally slightly more effective than amine formulations. However, ester forumulations are generally more volatile resulting in a greater risk of off-site movement. This study demonstrated that using an amine formulation does not necessarily mean that some weed control must be sacrificed. 16

24 ONE PASS CORN PROGRAMS Brookings Research Farm Grft 6/9/11 Wibw 6/9/11 Colq 6/9/11 Wimu 6/9/11 Grft 7/11/11 Wibw 7/11/11 Colq 7/11/11 Wimu 7/11/11 Grft 9/12/11 Wibw 9/12/11 Yield bu/a 10/14/11 Check b 0 b 0 b 0 b 0 d 0 e 0 b 0 b 0 d 0 c 136 b Pre Corvus+Atrazine 5.6 oz + 1 qt 100 a 100 a 100 a 100 a 98 a 96 b 100 a 100 a 98 a 95 b 197 a Corvus+Sharpen 5.6 oz + 3 oz 100 a 100 a 100 a 100 a 94 ab 100 a 100 a 100 a 96 ab 99 a 194 a Balance Flexx+Atrazine 6 oz + 1 qt 100 a 100 a 100 a 100 a 98 a 95 bc 100 a 100 a 98 a 95 b 190 a 17 Epost Corvus+Atrazine 5.6 oz + 1 pt c 100 a 100 a 100 a 88 c 99 a 191 a Balance Flexx+Atrazine 6 oz + 1 qt bc 100 a 100 a 100 a 92 b 98 a 186 a Lumax+Roundup Pmax+ 1 qt + 22 oz a 99 a 100 a 100 a 98 a 98 a 194 a AMS Harness Xtra 5.6L+ Roundup Pmax+AMS 1.7 lb 1 qt + 22 oz lb a 99 a 100 a 100 a 99 a 99 a 193 a Midpost Capreno+COC+AMS 3 oz + 1% lb ab 93 c 100 a 100 a 96 ab 99 a 192 a Capreno+Roundup Pmax+ 3 oz + 22 oz a 97 ab 100 a 100 a 99 a 99 a 186 a AMS 1.7 lb Capreno+Atrazine+ 3 oz + 1 qt bc 100 a 100 a 100 a 93 ab 98 a 188 a COC+AMS 1% lb Capreno+Atrazine+ 3 oz + 1 qt a 100 a 100 a 100 a 99 a 99 a 187 a Roundup Pmax+AMS 22 oz lb Halex GT+Atrazine+ 3.6 pt + 1 pt a 99 a 100 a 100 a 99 a 99 a 182 a NIS+AMS 0.25% lb Surestart+Durango DMA+ AMS 1.5 pt + 24 oz lb a 87 d 100 a 100 a 99 a 95 b 185 a

25 ONE PASS CORN PROGRAMS Brookings Research Farm RCB: 3 reps Variety: Pio 9494 RR/LL Pre: 1 st week 0.53 inches Planting Date: 5/6/11 2 nd week 1.06 inches Pre: 5/6/11 Epost: 1 st week 0.65 inches Epost: 6/8/11 Corn 5-7 in; Wibw 2-4 in; Grft 3-5 in; Colq 1-2 in; Wimu 2-5 in. 2 nd week 2.45 inches Midpost: 6/15/11 Corn 8-10 in; Wibw 3-5 in; Grft 4-6 in; Colq 2-4 in; Wimu 4-6 in. Midpost: 1 st week 2.45 inches Soil: Clay Loam; 3.0% OM; 6.5 ph 2 nd week 0.24 inches Wibw=Wild buckwheat Colq=Common lambsquarters Wimu=Wild mustard Grft=Green foxtail 18 The objective of this study was to evaluate one pass weed control programs that include Balance (isoxaflutole), Corvus (isoxaflutole + thiencarbazone) or Capreno (tembotrione + thiencarbazone). Most treatments resulted in very good weed control. Corvus and Balance were more effective on green foxtail when applied PRE compared to POST. Surestart was less effective on wild buckwheat than treatments containing atrazine or Capreno when applied mid-post. The lack of foliar activity is somewhat unexpected, but consistent with other studies, since Surestart contains clopyralid (e.g. Stinger). Therefore, results from this study demonstrated that Balance, Corvus, or Capreno can be effective components of glyphosate-based herbicide programs.

26 ONE PASS CORN PROGRAMS Southeast Research Farm Vele 7/7/11 Cowh 7/7/11 Grft 7/7/11 Vele 8/2/11 Grft 8/2/11 Vele 9/15/11 Cowh 9/15/11 Grft 9/15/11 Yield bu/a 10/17/11 Check b 0 b 0 b 0 e 0 d 0 e 0 c 0 d 60 c Pre Corvus+Atrazine 5.6 oz + 1 qt 98 a 99 a 99 a 96 ab 99 a 92 a 98 a 99 a 152 a Corvus+Sharpen 5.6 oz + 3 oz 99 a 99 a 99 a 97 ab 99 a 91 ab 92 ab 98 a 144 a Balance Flexx+Atrazine 6 oz + 1 qt 98 a 99 a 98 a 94 ab 95 a 83 abc 91 ab 96 a 137 ab Epost Corvus+Atrazine 5.6 oz + 1 pt 99 a 99 a 98 a 97 a 99 a 91 ab 95 ab 98 a 151 a Balance Flexx+Atrazine 6 oz + 1 qt 99 a 99 a 99 a 96 ab 98 a 90 ab 96 ab 97 a 148 a Lumax+Roundup Pmax 1 qt + 22 oz 99 a 99 a 99 a 96 ab 98 a 90 ab 93 ab 97 a 144 a +AMS Harness Xtra 5.6L+ Roundup Pmax+AMS lb 1 qt + 22 oz +1.7 lb 98 a 99 a 99 a 91 ab 98 a 85 abc 93 ab 98 a 144 a Midpost Capreno+COC+AMS 3 oz + 1% lb Capreno+Roundup Pmax 3 oz + 22 oz +AMS lb Capreno+Atrazine 3 oz + 1 qt +COC+AMS + 1% +1.7 lb Capreno+Atrazine+ 3 oz + 1 qt + Roundup Pmax+AMS 22 oz +1.7 lb Halex GT+Atrazine+ 3.6 pt + 1 pt + NIS+AMS Surestart+Durango DMA +AMS 0.25%+1.5lb 1.5 pt + 24 oz lb d 43 c 63 d 89 b 55 c 120 b b 99 a 80 c 92 ab 98 a 140 ab ab 84 b 82 bc 95 ab 74 b 135 ab ab 98 a 90 ab 98 a 96 a 144 a ab 96 a 91 ab 97 ab 96 a 132 ab c 99 a 77 c 98 a 99 a 137 ab RCB: 4 reps Variety: DKC 5259 VT3 Pre: 1 st week 1.02 inches Planting Date: 5/10/11 2 nd week 2.10 inches Pre: 5/10/11 Epost: 1 st week 1.35 inches Epost: 6/7/11 Corn 3-5 in; 2 nd week 2.09 inches Vele 1-2 in; Cowh in; Grft 1-3 in. Midpost: 1 st week 0.36 inches Midpost: 6/24/11 Corn 6-7lf in; 2 nd week 0.00 inches Vele 1-8 in; Cowh 1-2 in; Grft 3-5 in, 3-4 lf. Soil: Clay Loam; 3.5% OM; 6.6 ph Vele=Velvetleaf Cowh=Common waterhemp Grft=Green foxtail 19

27 ONE PASS CORN PROGRAMS Southeast Research Farm The objective of this study was to evaluate one pass weed control programs that include Balance (isoxaflutole), Corvus (isoxaflutole + thiencarbazone) or Capreno (tembotrione + thiencarbazone). The PRE or early-post treatments seemed to be more consistent than the mid-post treatments. The least velvetleaf control was observed in the Balance + atrazine PRE or Harness Xtra (acetochlor + atrazine) mid-post treatments. The most consistent mid-post included Capreno + atrazine + Roundup and Halex (metolachlor + mesotrione + glyphosate) + atrazine. Therefore, results from this study demonstrated that programs containing Balance, Corvus, or Capreno can be equally or more effective than other herbicide programs on the market. 20

28 TWO PASS CORN PROGRAMS Brookings Research Farm Grft 6/15/11 Pesw 6/15/11 Wibw 6/15/11 Wibw 6/25/11 Grft 7/11/11 Wibw 7/11/11 Pesw 7/11/11 Colq 7/11/11 Grft 9/12/11 Wibw 9/12/11 Yield bu/a 10/14/11 Check c 0 c 0 b 0 d 0 b 0 d 0 b 0 b 0 b 0 c 103 b 21 Pre & Midpost Corvus+Atrazine & Laudis+MSO+AMS Corvus+Atrazine & Ignite+AMS Corvus+Atrazine & Roundup Pmax+AMS Corvus+Atrazine & Capreno+COC+AMS Balance Flexx+Atrazine & Ignite+AMS Balance Flexx+Atrazine & Roundup Pmax+AMS Balance Flexx+Atrazine & Capreno+COC+AMS Lumax & Touchdown Total+AMS Harness Xtra 5.6L & Roundup Pmax+AMS Verdict & Status+Roundup Pmax+ AMS Tripleflex & Roundup Pmax+AMS 3 oz + 1 qt & 3 oz + 1% lb 3 oz + 1 qt & 22 oz + 3 lb 3 oz + 1 qt & 22 oz + 3 lb 3 oz + 1 qt & 3 oz + 1% lb 6 oz + 1 pt & 22 oz + 3 lb 6 oz + 1 pt & 22 oz + 3 lb 6 oz + 1 pt & 3 oz + 1% lb 2 qt & 24 oz lb 2 qt & 22 oz lb 13 oz & 2.5 oz +22 oz lb 1 qt & 22 oz lb 97 a 99 a 94 a 89 bc 99 a 88 c 100 a 100 a 99 a 95 b 195 a 97 a 99 a 94 a 89 bc 100 a 97 ab 100 a 100 a 99 a 97 a 192 a 97 a 99 a 94 a 89 bc 100 a 100 a 100 a 100 a 99 a 99 a 196 a 97 a 99 a 94 a 89 bc 99 a 96 ab 100 a 100 a 99 a 99 a 182 a 94 b 99 a 95 a 87 c 100 a 97 ab 100 a 100 a 99 a 98 a 191 a 94 b 99 a 95 a 87 c 99 a 100 a 100 a 100 a 99 a 99 a 199 a 94 b 99 a 95 a 87 c 99 a 94 b 100 a 100 a 99 a 98 a 178 a 98 a 99 a 97 a 91 abc 100 a 99 a 100 a 100 a 99 a 99 a 198 a 99 a 99 a 99 a 98 ab 100 a 100 a 100 a 100 a 99 a 99 a 188 a 97 a 99 a 99 a 99 a 99 a 100 a 100 a 100 a 99 a 99 a 183 a 99 a 97 b 93 a 88 bc 100 a 99 a 100 a 100 a 99 a 99 a 186 a

29 TWO PASS CORN PROGRAMS Brookings Research Farm RCB: 3 reps Variety: Pio 9494 RR/LL Pre: 1 st week 0.53 inches Planting Date: 5/6/11 2 nd week 1.06 inches Pre: 5/6/11 Midpost: 1 st week 0.94 inches Midpost: 6/25/11 Corn V6, 15 in; Grft 1-3 in; Pesw 2-5 in; Wibw 3-5 in; Colq 2-4 in. 2 nd week 0.15 inches Soil: Clay Loam; 3.0% OM; 6.5 ph Grft=Green foxtail Pesw=Pennsylvania smartweed Wibw=Wild buckwheat Colq=Common lambsquarters 22 The objective of this study was to evaluate two pass programs that include Corvus (isoxaflutole + thiencarbazone) or Balance (isoxaflutole) in corn. Most herbicide programs controlled most weed species, except wild buckwheat. s with Harness Xtra (acetochlor + atrazine), Verdict (saflufenacil + dimethenamid), or Lumax (metolachlor + mesotrione + atrazine) resulted in the greater than 90% buckwheat control. If atrazine can not be used, it appears that Verdict would be more effective than Tripleflex (acetochlor + flumetsulam + clopyralid). Wild buckwheat control seemed to be similar among treatments at the end of the summer. Corn yield was similar among treatments indicating that the weed escapes were not large enough to affect yield. In summary, this study demonstrated that programs containing Corvus or Balance may be effective for many common weed species, there could be some wild buckwheat escapes that may appear in mid-summer.

30 TWO PASS CORN PROGRAMS Southeast Research Farm Grft 6/27/11 Cowh 6/27/11 Vele 6/27/11 Vele 8/2/11 Cowh 8/2/11 Grft 8/2/11 Vele 9/15/11 Cowh 9/15/11 Yield bu/a 10/17/11 Check d 0 d 0 d 0 d 0 c 0 b 0 d 0 c 59 b Pre & Midpost Corvus+Atrazine & Laudis+MSO+ AMS Corvus+Atrazine & Ignite+AMS Corvus+Atrazine & RU Pmax+AMS Corvus+Atrazine & Capreno+COC+ AMS Balance Flexx+Atrazine & Ignite+AMS Balance Flexx+Atrazine & RU Pmax+AMS Balance Flexx+Atrazine & Capreno+COC+ AMS Lumax & Touchdown Total+ AMS Harness Xtra 5.6L & RU Pmax+AMS Verdict & Status+RU Pmax +AMS Tripleflex & RU Pmax+AMS 3 oz + 1 qt & 3 oz + 1% lb 3 oz + 1 qt & 22 oz + 3 lb 3 oz + 1 qt & 22 oz + 3 lb 3 oz + 1 qt & 3 oz + 1% lb 6 oz + 1 pt & 22 oz + 3 lb 6 oz + 1 pt & 22 oz + 3 lb 6 oz + 1 pt & 3 oz + 1% lb 2 qt & 24 oz lb 2 qt & 22 oz +1.7 lb 13 oz & 2.5 oz+22 oz lb 1 qt & 22 oz +1.7 lb 99 a 98 a 94 ab 95 ab 99 a 98 a 84 ab 99 a 143 a 99 a 98 a 94 ab 94 ab 98 a 99 a 82 ab 99 a 145 a 99 a 98 a 94 ab 93 ab 98 a 99 a 81 ab 99 a 147 a 99 a 98 a 94 ab 96 a 98 a 99 a 84 ab 99 a 134 a 97 b 99 a 97 a 97 a 97 a 99 a 84 ab 98 a 149 a 97 b 99 a 97 a 94 ab 99 a 99 a 81 ab 99 a 142 a 97 b 99 a 97 a 97 a 99 a 98 a 87 a 99 a 143 a 99 a 98 a 87 bc 89 bc 98 a 99 a 75 b 99 a 139 a 99 a 98 a 81 c 85 c 92 b 99 a 65 c 98 a 135 a 98 a 86 b 85 c 94 ab 93 b 99 a 78 ab 91 b 129 a 98 a 78 c 93 ab 91 ab 99 a 99 a 78 ab 99 a 136 a RCB: 4 reps Variety: Pio 9494 RR/LL Pre: 1 st week 1.02 inches Planting Date: 5/10/11 2 nd week 2.10 inches Pre: 5/10/11 Post: 1 st week 0.00 inches Post: 6/28/11 Corn V in; Cowh 1-3 in; 2 nd week 0.00 inches Vele 1-3 in. Grft 2-4 in. Soil: Silty Clay; 3.5% OM; 6.6 ph Grft=Green foxtail Cowh=Common waterhemp Vele=Velvetleaf 23

31 TWO PASS CORN PROGRAMS Southeast Research Farm The objective of this study was to evaluate two pass programs that include Corvus (isoxaflutole + thiencarbazone) or Balance (isoxaflutole) in corn. Many of these programs resulted in velvetleaf control that was equal to or greater than that in the Verdict (saflufenacil + dimethenamid), Harness Xtra (acetochlor + atrazine), or TripleFlex (acetochlor + flumetsulam + clopyralid) programs. Therefore, results from this study demonstrated that herbicide programs that include Corvus or Balance Flex may provide very good weed control, including good control of velvetleaf which is a difficult weed in glyphosate-based systems. 24

32 SURESTART COMPARISONS Northeast Research Farm Corw 6/11/11 Wibw 6/11/11 Colq 6/11/11 Bygr 7/13/11 Corw 7/13/11 Wibw 7/13/11 Pesw 7/13/11 Kocz 7/13/11 Bygr 9/2/11 Corw 9/2/11 Wibw 9/2/11 Kocz 9/2/11 Pre & Lpost Surestart+Durango DMA+AMS 28 oz + 24 oz + 2.5% 85 b 11 e 95 b 91 ab 88 de 87 de 97 a 96 a 83 cd 78 c 86 b 98 a Corvus+Durango DMA+AMS 5.6 oz + 24 oz + 2.5% 97 a 69 c 99 a 94 ab 94 ab 94 a-d 98 a 99 a 90 abc 91 a 89 b 98 a Integrity+Durango DMA+AMS 13 oz + 24 oz + 2.5% 87 b 96 a 97 a 92 ab 86 def 92 a-d 96 a 97 a 89 abc 80 bc 93 ab 98 a Lumax+Durango DMA+AMS 80 oz + 24 oz + 2.5% 89 b 83 b 99 a 97 a 96 ab 95 abc 98 a 98 a 94 a 93 a 91 ab 98 a 25 Epost Surestart+Durango DMA+AMS 28 oz + 24 oz + 2.5% ab 83 fg 73 g 75 e 68 f 92 abc 77 c 93 ab 68 c Corvus+Durango DMA+AMS 5.6 oz + 24 oz + 2.5% a 98 a 89 cde 98 a 87 bc 94 a 94 a 88 b 85 b Expert+AMS 3 qt + 2% a 89 cd 98 a 98 a 98 a 94 ab 88 ab 97 a 98 a Halex GT+NIS+AMS 4 pt % + 1% ab 81 g 75 g 97 a 85 bcd 92 abc 80 bc 88 b 89 b Lpost Surestart+Durango DMA+AMS 28 oz + 24 oz + 2.5% c 96 ab 89 b-e 83 bcd 83 b-e 72 e 87 ab 93 ab 91 ab Expert+AMS 3 qt + 2% ab 93 bc 97 ab 97 a 97 a 85 a-d 91 a 98 a 97 a Halex GT+NIS+AMS 4 pt % + 1% c 96 ab 79 fg 80 d 63 f 79 d 88 ab 93 ab 66 c Durango DMA+AMS 24 oz + 2.5% e 85 ef 75 g 69 f 77 de 50 f Check c 0 f 0 c 0 f 0 h 0 h 0 g 0 g 0 g 0 d 0 c 0 d

33 SURESTART COMPARISONS Northeast Research Farm RCB: 4 reps Variety: DKC VT3 Pre: 1 st week 0.46 inches Planting Date: 5/5/11 2 nd week 0.48 inches Pre: 5/5/11 Epost: 1 st week 0.00 inches Epost: 6/1/11 Corn 2 collar, 4 in; Corw 1-3 in; Wibw 1-2 in; 2 nd week 0.85 inches Colq 1-3 in; Bygr 1-3 in; Pesw 1-2 in; Kocz 1-3 in. Lpost: 1 st week 0.66 inches Lpost: 6/11/11 Corn 4 lf, 5-7 in; Corw 1-4 in; Wibw 2-4 in; 2 nd week 1.89 inches Colq 3-4 in; Bygr 3-4 in; Pesw 2-4 in; Kocz 2-4 in. Soil: Clay Loam; 3.2% OM; 6.3 ph Corw=Common ragweed Wibw=Wild buckwheat Colq=Common lambsquarters Bygr=Barnyardgrass Pesw=Pennsylvania smartweed Kocz=Kochia 26 The objective of this study was to evaluate Surestart (acetochlor + flumetsulam + clopyralid) programs in corn. All treatments include N PAK AMS. Glyphosate (Durango) alone resulted in only moderate weed control which demonstrates the importance of PRE s or tank mix partners. The most effective program may have been Lumax (metolachlor + mesotrione + atrazine) PRE followed by Durango. Most treatments had either some grass or broadleaf weed escapes at some point in the season. Including Surestart in herbicide programs improved weed control relative to Durango alone, but other herbicides may have improved weed control on some weed species slightly more at different times in the growing season.

34 FIERCE EARLY PREPLANT BURNDOWN Southeast Research Farm * Bygr 6/22/11 Cowh 6/22/11 Pesw 6/22/11 6/22/11 Bygr 8/9/11 Vele 8/9/11 Pesw 8/9/11 Cowh 8/9/11 Yield bu/a 10/17/11 Check c 0 d 0 c 0 a 0 b 0 b 0 b 0 b 88 b EPP & Post RU Pmax+Fierce & RU Original Max RU Pmax+Fierce+Aatrex & RU Pmax RU Pmax+Fierce & RU Pmax RU Pmax+Fierce & RU Pmax Pre & Post RU Pmax+Harness Xtra & RU Pmax RU Pmax+Lexar & RU Pmax RU Pmax+Corvus+Aatrex & RU Pmax RU Pmax+Verdict & RU Pmax 22 oz + 3 oz & 22 oz 22 oz + 3 oz +1 pt & 22 oz 22 oz oz & 22 oz 22 oz oz & 22 oz 22 oz qt & 22 oz 22 oz qt & 22 oz 22 oz +3 oz + 1 qt & 22 oz lb 22 oz + 13 oz & 22 oz 99 ab 99 a 99 a 0 a 99 a 99 a 99 a 99 a 177 a 99 ab 100 a 100 a 0 a 99 a 99 a 99 a 99 a 170 a 99 ab 99 a 99 a 0 a 99 a 99 a 99 a 99 a 174 a 100 a 100 a 100 a 0 a 99 a 99 a 99 a 99 a 173 a 98 b 92 c 99 b 0 a 99 a 99 a 99 a 99 a 180 a 100 a 100 a 100 a 0 a 99 a 99 a 99 a 99 a 173 a 99 ab 95 b 99 a 0 a 99 a 99 a 99 a 99 a 177 a 99 ab 100 a 100 a 0 a 99 a 99 a 99 a 99 a 170 a *All treatments with RU included AMS at 2.5 lb/a. RCB: 4 reps Variety: DKC 5259 VT3 EPP: 1 st week 0.92 inches Planting Date: 5/10/11 2 nd week 0.05 inches EPP: 4/25/11 Cowh cotyledon Pre: 1 st week 1.02 inches Pre: 5/10/11 2 nd week 2.10 inches Post: 6/28/11 Corn V6, in; Cowh 1-3 in; Vele 1-3 in. Post: 1 st week 0.00 inches Bygr 1-4 in; Pesw 2-4 in. 2 nd week 0.00 inches Soil: Silty Clay Loam; 3.0% OM; 6.8 ph =Visual Crop Response Rating (0=no injury; 100=complete kill) Bygr=Barnyardgrass Cowh=Common waterhemp Pesw=Pennsylvania smartweed Vele=Velvetleaf The objective of this study was to evaluate the efficacy of Fierce (flumioxazin + pyroxasulfone) in corn. Pyroxasulfone is a new herbicide that is similar to metolachlor (Dual) or acetochlor (Harness). Since Fierce contains flumioxazine, it will likely need to be applied at least 14 days prior to corn planting. All the Fierce programs evaluated in this study resulted in nearly complete weed control with excellent crop safety. Therefore, results from this study demonstrated that Fierce may be an effective herbicide in corn. 27